Quiz about QN37 - Matemáticas del siglo XXI - Trigonometría III

Question 1

De las afirmaciones:

(1) sen (-x) = sen x para todo x.

(2) cos (-x) = cos x para todo x.

es correcto asegurar que

Accepted Answer

(1) es falsa y (2) es verdadera.

Answer

(1) y (2) son verdaderas

Answer

(1) es verdadera y (2) es falsa.

Answer

(1) y (2) son falsas.

Question 2

Si $$\frac{\pi}{2}< heta<\pi$$ y $$\sin heta=\frac{4}{5}$$ entonces $$ an heta$$

Accepted Answer

$$-\frac{4}{3}$$

Answer

$$-\frac{5}{4}$$

Answer

$$\frac{4}{3}$$

Answer

$$\frac{5}{4}$$

Question 3

Si $$f\left( heta ight)=\cos\ \left(\frac{\pi- heta}{3} ight)$$ entonces $$f\left(2\pi ight)-f\left(0 ight)$$ es igual a

Accepted Answer

Answer

$$2\cos\left(\frac{\pi}{3}\right)$$ -

Answer

$$-2\cos\left(\frac{\pi}{3}\right)$$

Answer

$$\cos\ \frac{\pi}{3}$$

Question 4

Si g(x) = sec x + cos x es verdadero afirmar que

Accepted Answer

$$g\left(\frac{\pi}{2}\right)\ no\ está\ definida$$

Answer

$$g\left(\frac{\pi}{2}\right)=0$$

Answer

$$g\left(\pi\right)=-1$$

Answer

$$g\left(\pi\right)\ no\ definida$$

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